[Rodrigo] writes in to show off his project to add some flair to the lighted buttons ... that the actual USB interface is being done with a stand-alone controller, so the Arduino here is being ...

[Paul Stoffregen], creator of the Teensy series of dev boards, previously implemented a six-axis joystick for Teensyduino, the Arduino library ... of pots and buttons for a USB joystick.

It's of course backwards compatible with existing Arduino add-ons, but sets itself apart with a new USB controller with lower latency and driver-free operation on Mac and Linux. This should make ...